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//
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// notice, this list of conditions and the following disclaimer.
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// in the documentation and/or other materials provided with the
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#include "config.h"

#if ENABLE(SVG)
#include "SVGResourceClipper.h"
#include "AffineTransform.h"
#include "GraphicsContext.h"

#include "SkPath.h"

namespace WebCore {

void SVGResourceClipper::applyClip(GraphicsContext* context, const FloatRect& boundingBox) const
{
    Vector<ClipData> data = m_clipData.clipData();
    unsigned int count = data.size();
    if (!count)
        return;

    static Path clipPath;
    clipPath.platformPath()->reset();

    for (unsigned int x = 0; x < count; x++) {
        Path path = data[x].path;

        if (path.isEmpty())
            continue;
        path.closeSubpath();

        if (data[x].bboxUnits) {
            // Make use of the clipping units
            AffineTransform transform;
            transform.translate(boundingBox.x(), boundingBox.y());
            transform.scale(boundingBox.width(), boundingBox.height());
            path.transform(transform);
        }

        SkPath* platformPath = path.platformPath();

        clipPath.platformPath()->addPath(*platformPath);
    }

    //TODO(jhaas): this currently does not respect clipping path
    //winding rules (even-odd or nonzero)

    context->clip(clipPath);
}

} // namespace WebCore

#endif
